WO2004098974A1 - Dispositif de serrage d'un transducteur sur un rail - Google Patents

Dispositif de serrage d'un transducteur sur un rail Download PDF

Info

Publication number
WO2004098974A1
WO2004098974A1 PCT/IB2004/001406 IB2004001406W WO2004098974A1 WO 2004098974 A1 WO2004098974 A1 WO 2004098974A1 IB 2004001406 W IB2004001406 W IB 2004001406W WO 2004098974 A1 WO2004098974 A1 WO 2004098974A1
Authority
WO
WIPO (PCT)
Prior art keywords
rail
transducer
arm
foot
web
Prior art date
Application number
PCT/IB2004/001406
Other languages
English (en)
Inventor
Brian Sherriff
Francois Alwyn Burger
Original Assignee
Armscor Business (Proprietary) Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Armscor Business (Proprietary) Limited filed Critical Armscor Business (Proprietary) Limited
Priority to EP04731415A priority Critical patent/EP1620299B1/fr
Priority to CA2524691A priority patent/CA2524691C/fr
Priority to AU2004236042A priority patent/AU2004236042B2/en
Priority to DE602004002863T priority patent/DE602004002863T2/de
Priority to PL04731415T priority patent/PL1620299T3/pl
Priority to US10/555,506 priority patent/US7530502B2/en
Publication of WO2004098974A1 publication Critical patent/WO2004098974A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
    • B61K9/08—Measuring installations for surveying permanent way
    • B61K9/10—Measuring installations for surveying permanent way for detecting cracks in rails or welds thereof
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B26/00—Tracks or track components not covered by any one of the preceding groups
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/223—Supports, positioning or alignment in fixed situation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/262—Linear objects
    • G01N2291/2623—Rails; Railroads

Definitions

  • THIS invention relates to a clamp for securing a transducer to a train rail.
  • acoustic or ultrasonic transducers are used to excite a rail so that the resulting propagation modes travel for a substantial distance along the rail.
  • a receiver unit located a substantial distance away from the transducer can detect such propagation modes and can be used to provide an indication of the condition of the rail, and can thus be used to warn of a break in the rail or other mechanical damage.
  • a system of this kind is described in South African patent no. 99/6936.
  • a clamp for securing a transducer to a train rail of the kind having a foot, a web, and a head, the clamp comprising:
  • bracket having a base portion shaped to engage the foot of the rail and an upright arm at one end of the base portion which extends adjacent the web of the rail when the base portion engages the foot of the rail;
  • an adjuster supported by the arm for engaging the transducer and urging the transducer into contact with the rail.
  • the base portion of the bracket may be shaped to fit under the foot of the rail.
  • the bracket is formed from a material selected to be sufficiently resilient to deform elastically when the adjuster urges the transducer into contact with the rail in use.
  • the bracket may be formed from stainless steel.
  • the adjuster may comprise a threaded member passing through the arm and movable axially towards the rail on rotation thereof, the threaded member being oriented so as to urge the transducer into engagement with the rail between the head and the web of the rail.
  • the threaded member is an adjuster bolt which passes through an aperture in an upper end of the arm and a complementally threaded aperture in a reaction member located against the arm, between the arm and the rail, so that tightening of the adjuster bolt in use urges the transducer against the rail and causes elastic deformation of the arm away from the rail.
  • the reaction member may be a pin or bar supported by the arm with its axis parallel to the rail, the pin or bar being rotatable about its axis to an extent sufficient to allow the adjuster bolt to accommodate variations in the shape of the transducer and/or the rail.
  • the threaded member is preferably adjustable to apply force to the transducer on a line inclined at 45° to the plane of the rail web at the point of intersection of the rail head and the rail web.
  • the invention extends to a transducer installation comprising a clamp as defined above, and a transducer comprising a body shaped to be urged into engagement with a train rail between the head and foot of the rail.
  • Figure 1 is a pictorial view of a clamp according to the invention in use, clamping a transducer to a rail;
  • Figure 2 is an end view of the clamp shown in Figure 1.
  • the rail 10 comprises a head 12, an upright web 14 and a flattened foot 16.
  • a bracket 18 Fitted under the foot of the rail is a bracket 18 forming part of a clamp of the invention, the bracket having a foot portion 20 which fits under the foot of the rail, and an upright arm 22 at one end of the foot portion.
  • the bracket 18 is formed from a single piece of steel bar, the thickness of the bar and the type of steel being selected to provide the desired characteristics, particularly suitable resilience or springiness.
  • type 316 stainless steel is a suitable material, having excellent corrosion resistance, a high tensile strength to enable a high clamping force to be achieved, and a suitable degree of resilience or springiness to enable the necessary clamping force to be maintained, as described below.
  • Another material having suitable resilience and mechanical properties could be used instead.
  • an upwardly extending flange 24 is provided.
  • the bracket is retained between the underside of the foot 16 of the rail and a sleeper or other support on which the rail rests. Once the bracket 18 has been fitted to the underside of the rail, the flange 24 and the arm 22 prevent removal of the bracket from the rail, without additional fasteners being required. This has the advantage that no modification of the rail, whether by the drilling of holes into the rail or in any other way, is required.
  • the upper end 26 of the arm 22 is bent outwardly at approximately 45°, and an aperture is formed in the end 26 to accommodate a threaded adjuster bolt 28.
  • a mounting plate 30 shaped complementally to the upper end of the arm 22 and formed of stainless steel is mounted, for example by being welded to the arm 22.
  • the aperture in the upper end 26 of the arm 22 also extends through the mounting plate 30, so that the bolt 28 is a loose fit in the aperture.
  • A. horizontal part-cylindrical groove 32 is formed in the upper surface of the mounting plate 30 and accommodates a stainless steel pin or bar 34 which is oriented with its longitudinal axis parallel to the axis of the rail 10.
  • a transverse threaded hole is formed in the pin or bar to receive the bolt 28, so that rotation of the bolt about its axis moves its upper end towards (or away from) the rail.
  • a nut 36 is fitted to the threaded inner end of the adjuster bolt to allow locking of the clamp once the bolt 28 has been adjusted to the required position.
  • the aperture in the upper end 26 of the arm and the corresponding aperture in the plate 30 are sufficiently large to permit the pin or bar 34 to be rotated about its axis in the groove 32, thus changing the angle of the bolt slightly relative to the plane of the rail web, to accommodate variations in the shape of the rail 10 or the transducer which is to be clamped against the rail in use.
  • a transducer 38 which comprises a stack of piezo-electric discs in a cylindrical housing, bolted at one end to an aluminium body 40 and having a back mass at the other end, is located against the upper part of the rail web and the underside of the rail head as shown, with the upper end of the adjuster bolt 28 bearing against the aluminium body 40 of the transducer.
  • the aluminium body 40 is shaped to fit snugly against the web of the rail, abutting the portions of the rail between the underside of the head and the web, and between the web and the foot, as illustrated.
  • the arm 22 When the adjuster bolt 28 is torqued sufficiently, for example, to a value in the region of 15 Nm, the arm 22 is deformed elastically away from the head and web of the rail, and the base portion of the bracket 18 underneath the foot of the rail is caused to bend or bow somewhat.
  • the relatively soft aluminium body of the transducer can deform to accommodate such deformation of the rail, maintaining an adequate contact area between the transducer and the rail.
  • the transducer can readily be electrically isolated from the rail if required.
  • the force line of the clamping arrangement is at 45° to the plane of the rail web at the point of intersection of the rail head and the web, ensuring optimum excitation signal insertion into the rail. This ensures that, within mechanical profile constraints, the rail is excited near its center of mass.
  • the axis of excitation in the transducer is along the central axis thereof.
  • this results in asymmetric excitation relative to the center line of the rail.
  • the excitation axis runs parallel to the rail center line at a standoff distance of roughly 45mm for a typical rail.
  • the different modes as viewed at a monitoring position located a substantial distance away from the excitation position, interfere with each other due to differing relative phase values at any specific point.
  • the interference can be constructive or destructive, depending on the distance from the point of excitation, effectively resulting in complex modulation of the monitored wave.
  • the magnitude of the excited modes, as well as the propagation loss experienced by the modes, is further influenced by rail temperature and related compression and stress forces. The excitation of different modes ensures that an adequate signal will be present at the monitoring position regardless of these factors, over distances in the region of 2 500 meters.

Landscapes

  • Engineering & Computer Science (AREA)
  • Immunology (AREA)
  • Chemical & Material Sciences (AREA)
  • Pathology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Railway Tracks (AREA)
  • Wire Bonding (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

Ce dispositif de serrage pour fixer un transducteur sur un rail de chemin de fer comprend une bride avec une base (18) qui enclenche le patin (16) du rail. Une branche verticale (22) à une extrémité de la base (18) s'étend à côté de l'âme (14) du rail et porte un dispositif d'ajustement fileté (28) qui enclenche le transducteur (38) et le presse contre le rail. Le dispositif de serrage est suffisamment élastique pour absorber sans difficultés des déformations temporaires et permanentes du rail lorsque le dispositif de serrage (28) est serré de manière prédéterminée.
PCT/IB2004/001406 2003-05-07 2004-05-06 Dispositif de serrage d'un transducteur sur un rail WO2004098974A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP04731415A EP1620299B1 (fr) 2003-05-07 2004-05-06 Dispositif de serrage d'un transducteur sur un rail
CA2524691A CA2524691C (fr) 2003-05-07 2004-05-06 Dispositif de serrage d'un transducteur sur un rail
AU2004236042A AU2004236042B2 (en) 2003-05-07 2004-05-06 Clamp for rail a transducer
DE602004002863T DE602004002863T2 (de) 2003-05-07 2004-05-06 Klemmvorrichtung eines eisenbahnwandlers
PL04731415T PL1620299T3 (pl) 2003-05-07 2004-05-06 Klamra do przetwornika szynowego
US10/555,506 US7530502B2 (en) 2003-05-07 2004-05-06 Clamp for a rail transducer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200303505 2003-05-07
ZA2003/3505 2003-05-07

Publications (1)

Publication Number Publication Date
WO2004098974A1 true WO2004098974A1 (fr) 2004-11-18

Family

ID=33435710

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/001406 WO2004098974A1 (fr) 2003-05-07 2004-05-06 Dispositif de serrage d'un transducteur sur un rail

Country Status (11)

Country Link
US (1) US7530502B2 (fr)
EP (1) EP1620299B1 (fr)
CN (1) CN100560414C (fr)
AT (1) ATE342834T1 (fr)
AU (1) AU2004236042B2 (fr)
CA (1) CA2524691C (fr)
DE (1) DE602004002863T2 (fr)
ES (1) ES2275219T3 (fr)
PL (1) PL1620299T3 (fr)
WO (1) WO2004098974A1 (fr)
ZA (1) ZA200508907B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2975359A1 (fr) * 2011-05-20 2012-11-23 Sncf Systeme de mesure dynamique de la charge des roues d'un train
WO2013027187A2 (fr) 2011-08-23 2013-02-28 Csir Système de contrôle de l'état d'éléments structuraux et procédé d'élaboration d'un tel système
EP3783151A1 (fr) * 2019-08-20 2021-02-24 Thales Management & Services Deutschland GmbH Dispositif de fixation et de positionnement d'un élément de surveillance de rail ainsi qu'utilisation dudit dispositif
DE102022109074A1 (de) 2022-04-13 2023-10-19 Gts Deutschland Gmbh Schnellspannvorrichtung, sensoranordnung mit einer schnellspannvorrichtung sowie verwendung einer schnellspannvorrichtung

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2622561C (fr) 2007-02-21 2015-09-29 Portec Rail Products, Inc. Dispositif de graissage pour rails
EP2370301A4 (fr) * 2008-09-19 2014-01-08 Portec Rail Products Inc Pince articulée
BRPI0913754B1 (pt) * 2008-09-19 2020-03-10 L.B. Foster Rail Technologies, Inc. Dispositivo de grampo e método para prender um dispositivo de grampo
US8157185B2 (en) * 2009-01-23 2012-04-17 Fastrax Industries, Inc. Strike attachment railroad signal line connector
US8157186B2 (en) * 2009-01-23 2012-04-17 Fastrax Industries, Inc. Strike attachment railroad anchor
US8955645B2 (en) 2009-05-29 2015-02-17 L.B. Foster Rail Technologies, Inc. Top of rail foam bar
US9914465B2 (en) 2009-05-29 2018-03-13 L.B. Foster Rail Technologies, Inc. Top of rail resilient bar
US8864043B2 (en) * 2011-02-17 2014-10-21 Rail Construction Equipment Company Rail fastening system
CN102721752B (zh) * 2012-06-29 2014-07-16 西南石油大学 一种适用于储油罐底板超声波检测的探头夹具
ZA201404072B (en) * 2014-06-03 2015-06-24 Csir Transducer
DE102016206940A1 (de) 2016-04-25 2017-10-26 Siemens Aktiengesellschaft Befestigungsvorrichtung und Verfahren zum Befestigen wenigstens eines Sensors an einer Eisenbahnschiene
US10533288B2 (en) * 2018-01-30 2020-01-14 Alstom Transport Technologies Railroad track wire connection and corresponding railroad installation
CN115233501B (zh) * 2022-09-15 2022-12-27 成都工业职业技术学院 一种预制铁路轨道底座及铁路轨道施工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592031A1 (fr) * 1992-09-25 1994-04-13 N.V. Nederlandse Spoorwegen Système et capteur pour détecter des trains
ZA996936B (en) 1998-12-21 2000-01-24 Inst Maritime Technology Pty L Railbreak indicating arrangement.
WO2000017632A2 (fr) * 1998-09-22 2000-03-30 Siemens Aktiengesellschaft Procede et dispositif pour detecter un defaut dans un rail de guidage
WO2002059593A2 (fr) * 2001-01-26 2002-08-01 Guided Ultrasonics (Rail) Ltd Controle de corps allonges non axi-symetriques

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GB941408A (en) * 1961-09-20 1963-11-13 P & M Co England Ltd Improvements in or relating to actuating mechanism for rail-and-flange lubricating apparatus for railway tracks
US3564488A (en) * 1969-06-16 1971-02-16 Hitachi Ltd Speed measuring device of moving objects
US3830427A (en) * 1973-02-12 1974-08-20 Contemporary Prod Inc Railway conductor bonding clamp
US4049230A (en) * 1976-02-06 1977-09-20 Minniear Carl E Bracket device
US4200856A (en) * 1978-06-01 1980-04-29 Westinghouse Air Brake Company Differential clamp-on railway vehicle wheel detector
US4593569A (en) * 1983-08-22 1986-06-10 Joy Ivan L Ultrasonic transducer unit to locate cracks in rail base
US5386727A (en) * 1992-06-02 1995-02-07 Herzog Contracting Corporation Dynamic rail longitudinal stress measuring system
CA2302760A1 (fr) * 1997-09-04 1999-03-11 Brian Neil Southon Compteur de roues de chemin de fer et systemes de commande de blocs
CN2443899Y (zh) * 2000-10-24 2001-08-22 朱广秀 铁路车辆超偏载动态测试仪
US6431794B1 (en) * 2001-03-23 2002-08-13 Michael J. Zweber Dock technology
CN2475641Y (zh) * 2001-06-04 2002-02-06 北方交通大学 钢轨动态变形测量装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592031A1 (fr) * 1992-09-25 1994-04-13 N.V. Nederlandse Spoorwegen Système et capteur pour détecter des trains
WO2000017632A2 (fr) * 1998-09-22 2000-03-30 Siemens Aktiengesellschaft Procede et dispositif pour detecter un defaut dans un rail de guidage
ZA996936B (en) 1998-12-21 2000-01-24 Inst Maritime Technology Pty L Railbreak indicating arrangement.
WO2002059593A2 (fr) * 2001-01-26 2002-08-01 Guided Ultrasonics (Rail) Ltd Controle de corps allonges non axi-symetriques

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2975359A1 (fr) * 2011-05-20 2012-11-23 Sncf Systeme de mesure dynamique de la charge des roues d'un train
WO2012160461A1 (fr) * 2011-05-20 2012-11-29 Societe Nationale Des Chemins De Fer Francais Sncf Systeme de mesure dynamique de la charge des roues d'un train
WO2013027187A2 (fr) 2011-08-23 2013-02-28 Csir Système de contrôle de l'état d'éléments structuraux et procédé d'élaboration d'un tel système
CN103842998A (zh) * 2011-08-23 2014-06-04 Csir公司 用于监测结构元件的状况的系统和开发该系统的方法
US9797869B2 (en) 2011-08-23 2017-10-24 Csir System for monitoring the condition of structural elements and a method of developing such a system
EP3783151A1 (fr) * 2019-08-20 2021-02-24 Thales Management & Services Deutschland GmbH Dispositif de fixation et de positionnement d'un élément de surveillance de rail ainsi qu'utilisation dudit dispositif
WO2021032627A1 (fr) * 2019-08-20 2021-02-25 Thales Management & Services Deutschland Gmbh Dispositif pour fixer un élément de surveillance de rail
CN114286775A (zh) * 2019-08-20 2022-04-05 塔莱斯管理与服务德国有限责任公司 用于固定轨监测元件的装置
DE102022109074A1 (de) 2022-04-13 2023-10-19 Gts Deutschland Gmbh Schnellspannvorrichtung, sensoranordnung mit einer schnellspannvorrichtung sowie verwendung einer schnellspannvorrichtung

Also Published As

Publication number Publication date
PL1620299T3 (pl) 2007-03-30
AU2004236042B2 (en) 2009-12-03
DE602004002863D1 (de) 2006-11-30
ES2275219T3 (es) 2007-06-01
ZA200508907B (en) 2007-03-28
US7530502B2 (en) 2009-05-12
CA2524691A1 (fr) 2004-11-18
EP1620299A1 (fr) 2006-02-01
CA2524691C (fr) 2011-11-15
CN1784330A (zh) 2006-06-07
ATE342834T1 (de) 2006-11-15
EP1620299B1 (fr) 2006-10-18
AU2004236042A1 (en) 2004-11-18
DE602004002863T2 (de) 2007-02-15
CN100560414C (zh) 2009-11-18
US20060289666A1 (en) 2006-12-28

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